PIC18F4321

Features:

• C compiler optimized architecture:
- Optional extended instruction set designed to optimize re-entrant code
• 100,000 erase/write cycle Enhanced Flash program memory typical
• 1,000,000 erase/write cycle Data EEPROM memory typical
• Flash/Data EEPROM Retention: 100 years typical
• Self-programmable under software control
• Priority levels for interrupts
• 8 x 8 Single-Cycle Hardware Multiplier
• Extended Watchdog Timer (WDT):
- Programmable period from 4 ms to 131s
• Single-Supply 5V In-Circuit Serial Programming™ (ICSP™) via two pins
• In-Circuit Debug (ICD) via two pins
• Wide operating voltage range: 2.0V to 5.5V
• Programmable Brown-out Reset (BOR) with software enable option
• Optional dedicated ICD/ICSP port (44-pin devices only)

Pinout






Specifications

Parameter Name	Value
Program Memory Type	Flash
Program Memory (KB)	8
CPU Speed (MIPS)	10
RAM Bytes	512
Data EEPROM (bytes)	256
Digital Communication Peripherals	1-A/E/USART, 1-MSSP(SPI/I2C)
Capture/Compare/PWM Peripherals	1 CCP, 1 ECCP
Timers	1 x 8-bit, 3 x 16-bit
ADC	13 ch, 10-bit
Comparators	2
Temperature Range (C)	-40 to 85
Operating Voltage Range (V)	2 to 5.5
Pin Count	40

Absolute Maximum Ratings(†)
Ambient temperature under bias.......................................................-40°C to +125°C
Storage temperature ....................................................................... -65°C to +150°C
Voltage on any pin with respect to V_SS (except V_DD and MCLR)..-0.3V to (V_DD + 0.3V)
Voltage on V_DD with respect to V_SS ....................................................... -0.3V to +7.5V
Voltage onMCLR with respect to V_SS (Note 2) ........................................ 0V to +13.25V
Total power dissipation (Note 1) ..............................................................................1.0W
Maximum current out of V_SS pin ...........................................................................300 mA
Maximum current into V_DD pin ...............................................................................250 mA
Input clamp current, I_IK (V_I < 0 or V_I > V_DD)....................................................... ±20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_DD) ................................................. ±20 mA
Maximum output current sunk by any I/O pin...........................................................25 mA
Maximum output current sourced by any I/O pin ......................................................25 mA
Maximum current sunk by all ports ..........................................................................200 mA
Maximum current sourced by all ports ....................................................................200 mA

Note 1: Power dissipation is calculated as follows:
Pdis = V_DD x {I_DD I_OH} + {(V_DD V_OH) x I_OH} + (V_OL x I_OL)
2: Voltage spikes below V_SS at the MCLR/VPP/RE3 pin, inducing currents greater than 80 mA, may cause latch-up. Thus, a series resistor of 50-100 should be used when applying a "low" level to the MCLR/V_PP/ RE3 pin, rather than pulling this pin directly to V_SS.

† NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.

Description

This powerful 10 MIPS (100 nanosecond instruction execution), yet easy-to-program (only 77 single word instructions) CMOS Flash-based 8-bit microcontroller PIC18F4321 packs Microchip's powerful PIC? architecture into a 44-pin package and is upwards compatible with the PIC16C5X, PIC12CXXX, PIC16CXX and PIC17CXX devices and provides a seamless migration path of software code to higher levels of hardware integration.

The PIC18F4321 features a C compiler-friendly development environment, 256 bytes of EEPROM, self-programming, an ICD, 2 capture/compare/PWM functions, 13 channels of 10-bit Analog-to-Digital (A/D) converter, 2 comparators, the synchronous serial port can be configured as either 3-wire Serial Peripheral Interface (SPI?) or the 2-wire Inter-Integrated Circuit (I2C?) bus and Enhanced Universal Asynchronous Receiver Transmitter (EUSART), 8 MHz internal RC oscillator and advanced low power oscillator controls.

All of these features make PIC18F4321 ideal for battery powered and power consumption critical applications including instrumentation and monitoring, data acquisition, power conditioning, environmental monitoring, telecom and consumer audio/video applications.